在EF Core中加载对象引用集合的正确方式是什么？

public class Order
{
    public int Id { get; set; }
    public string OrderNumber { get; set; }
    public virtual ICollection<OrderItem> OrderItems { get; set; }
}

using (var context = new YourDbContext())
{
    var order = context.Orders.Find(orderId);
    foreach (var orderItem in order.OrderItems)
    {
        // 处理订单项
    }
}

using (var context = new YourDbContext())
{
    var order = context.Orders.Find(orderId);
    context.Entry(order)
           .Collection(o => o.OrderItems)
           .Load();

    foreach (var orderItem in order.OrderItems)
    {
        // 处理订单项
    }
}